Pressure cooker



FIG. 1 is a side perspective view of a pressure cooker showing my new design;

FIG. 2 is a front perspective view of the embodiment shown in FIG. 1;

FIG. 3 is a rear perspective view of the embodiment shown in FIG. 1;

FIG. 4 is a top plan view of the embodiment shown in FIG. 1; and

FIG. 5 is a bottom plan view of the embodiment shown in FIG. 1. 

The ornamental design for a pressure cooker, substantially as shown and described. 